| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.749 | 0.520 | 3.911 | 5.913 |
| Arsenic | As (ppm) | 7.956 | 0.273 | 7.360 | 8.405 |
| Calcium | Ca (wt%) | 0.145 | 0.026 | 0.119 | 0.251 |
| Copper | Cu (ppm) | 12.578 | 1.317 | 10.576 | 17.380 |
| Iron | Fe (wt%) | 2.931 | 0.235 | 2.441 | 3.396 |
| Mercury | Hg (ppm) | 0.061 | 0.008 | 0.043 | 0.078 |
| Magnesium | Mg (wt%) | 0.346 | 0.031 | 0.283 | 0.404 |
| Manganese | Mn (ppm) | 665.564 | 97.416 | 475.336 | 852.766 |
| Sodium | Na (wt%) | 0.228 | 0.012 | 0.200 | 0.243 |
| Phosphorus | P (wt%) | 0.041 | 0.004 | 0.034 | 0.049 |
| Lead | Pb (ppm) | 24.162 | 1.674 | 21.427 | 27.859 |
| Selenium | Se (ppm) | 0.295 | 0.052 | 0.192 | 0.388 |
| Titanium | Ti (wt%) | 0.302 | 0.014 | 0.270 | 0.335 |
| Zinc | Zn (ppm) | 76.462 | 4.926 | 67.966 | 85.308 |